<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>table-行合并</title>
</head>
<body>


 <table border="1" width="90%" height="600">
     <tr>
       <td>1-1</td>
       <td>1-2</td>
       <td>1-3</td>
     </tr>
   <tr>
     <td>2-1</td>
     <td>2-2</td>
     <td rowspan="2">2-3</td>
   </tr>
   <tr>
     <td>3-1</td>
     <td>3-2</td>

   </tr>

 </table>
</body>
</html>